Topped by the highest dome in Rome (designed by Maderno) after St. Peter's, this huge and imposing 17th-century church is remarkably balanced in design. Note the early-17th-century frescoes in the choir vault by Domenichino and those by Lanfranco in the dome, one of the earliest ceilings in full Baroque style. Richly marbled and decorated chapels flank the nave, and in such a space, Puccini set the first act of Tosca.
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